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Propeller
Patent for a boat propeller that does not create a vacuum behind it and is more efficient than other propellers.
Date:
July 23, 1912
Creator:
Blake, David H.
System:
The Portal to Texas History
Railway-Tricycle.
Patent for a railway-tricycle that consists "of a frame carrying a front and rear wheel, a cross-bar mounted to swing on the said frame and carrying a guide-wheel for the second rail, and a handle-bar connected with the said cross-bar to manipulate the latter" (line 14-19).
Date:
November 26, 1895
Creator:
Mellor, William J.
System:
The Portal to Texas History